Seismology

Cassa de la Selva seismic station (CCAS)
Code: CCAS Name: Cassà de la Selva Latitude: 41.8828 N Longitude: 2.9041 E Height: 197 m
Instrumentation by channels and periods
Channel Start
date		 End
date		 Sensor
type		 Digitizer
type		 Instrumental
response
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HHZ 16/12/2005 - CMG3TB Trident [+info:]
HHN 16/12/2005 - CMG3TB Trident [+info:]
HHE 16/12/2005 - CMG3TB Trident [+info:]
General view of the diferent elements

General view of the diferent elements: instrumental house, lightning rod (PDC), geodetic pillar with GPS antenna, VSAT antenna, solar pannels and security fence.

Geological site condictions: Rocky outcrop (alterated granitoid at surface with nornfels, Carboniferous-Permian). See the hammer to the scale.

CONSTRUCTION PROCESS

Due to the geological characteristics of the selected sector of the massif of Gavarres, borehole seismic design has been done through a survey of about 30 m depth with the purpose of recording a good quality of the seismic signal.

Drilling survey at the site selected.

Geology log: The drilling survey cross alterated granitoids with the exception of a few meters of paleozoic phyllites. The method used to completion of the seismic borehole was percussion drilling.

Sensor: Seismometer sensor located at 32 m depth inside of the casing borehole.
Sensor installation.

Nameplate

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